Beating-engine bed-plate.



A. F. & O. B. BAHR.

BEATING ENGINE BED PLATE.

APPLICATION FILED NOV. 25, 1910.

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AMEL F. BAI-IB AND OTTO B. BAHR, OF MARION, INDIANA.

BEATING-ENGINE BED-PLATE.

Specification of Letters Patent.

Patented May so, 1911.

Application filed November 25, 1910. Serial No. 594,112.

To all whom it may concern:

Be it known that we, AMEL F. BAHR and Or'ro B. BAHR, citizens of theUnited States, and residents of Marion, in the county of Grant and Stateof Indiana, have invented a new and useful Improvement in Beating-Engine Bed-Plates, of which the following is a specification.

Our invention relates to bed plates for beating-engines and the objectof our improvement is to provide a hollow bed plate having integrallyformed teeth on both of its sides so that after the teeth on one sideare worn away it may be turned over to use the teeth on its other side.

A further object is to provide a plurality of short cross teethconnecting the longer parallel teeth at intervals to prevent the stockfrom sliding longitudinally of such parallel teeth.

We attain these objects by means of the bed plate illustrated in theaccompanying drawings, in which Figure 1 is a transverse section of ourbed plate and a portion of the roller of a beating engine; Fig. 2 is aplan view of the straight form of our bed plate with a portion of one ofits faces removed to show the ribs connecting the two sides of the bedplate; Fig. 3 is a plan view of the elbow form of our bed plate; and,Fig. i is a view, in perspective, of a portion of the bed plate shown inFig. 2.

Similar numerals of reference indicate similar parts throughout theseveral views.

Our bed plate may be made of any suitable metal but we prefer to use analloy of cast iron, steel and manganese to form a dis similar metal fromthe steel teeth of the grinding roller to reduce the friction producedbetween the grinding surfaces to a minimum. This alloy gives us a goodhard grinding surface with suflicient tenacity not to become easilybent, chipped or broken should a particle of foreign matter get into thepulp-mixture. e form the bed plate hollow and as thin as practical inorder to roduce its most efficient working qualities.

The hollow body portion of our improvement comprises the sides 5 joinedat intervals by means of the ribs 6, which are disposed perpendicular toand extend from edge to edge of such sides, and the diagonal ribs 7interposed between said ribs 6. Each of the diagonal ribs 7 is disposedat an angle to its next adjacent rib 7 substantially as illustrated, tobrace the upper side of the bed plate to prevent the working strain fromcrushing such connecting ribs. The bead 8 is formed along each insideedge of said sides to strengthen such edges. By forming each alternateconnecting rib in a diagonal relation with its next adjacent connectingrib and forming the beads 8 along the inner edges of said sides 5 we areable to form our body portion much thinner, thereby reducing the weightand the cost of manufacturing the bed plate.

Both of the sides 5 are provided, in a similar manner, with the cuttingteeth 9 and the cross connecting teeth 10, so that when the teeth on oneside are worn away the bed plate may be turned over to use the teeth onthe other side, thereby increasing the life of the bed plate. The crossteeth 10 are provided at intervals between the cutting teeth 9 toprevent the pulp mixture from sliding along the edges of such cuttingteeth and to aid in forcing the pulp mixture between the grindingsurfaces. The faces of the teeth 9 and 10 are formed to conform with thecurvature of the grinding roller 11, and a suitable supporting bed 12 isprovided to fit and support the bed plate in the beating-engine.

What we claim as new and desire to secure by Letters Patent, is

1. A beating-engine bed plate comprising a metallic body portion and aplurality of integrally formed cutting teeth on each of the two sides ofsuch metallic body portion in a manner that said metallic body portionmay be turned over after the cutting teeth on one of its sides have beenworn away to use the cutting teeth on its other side.

2. A beating-engine bed plate comprising a hollow metallic body portion,a plurality of supporting ribs formed in the hollow portion of saidhollow metallic body portion, each of said supporting ribs is disposedat an angle to its next adjacent supporting rib to brace each other, aplurality of integrally formed cutting teeth on each of the two sides ofsaid hollow metallic body portion in a manner that said hollow metallicbody portion may be turned over after the cutting teeth on one of itssides have been signed our names in the presence of two worn away to usethe cutting teeth on its witnesses.

other side and a luralit of cross connecting teeth formed integra l lywith and coni fig s necting said cutting teeth at intervals to preventthe pulp mixture from sliding longi- Witnesses: 1 tudinally of saidcutting teeth. HARRY L. GREEN,

In witness whereof, we have hereunto HARLEY F. HARDIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washingtonfl). G.

